phpcs error on travis for colorcodes in the string

<?php
$string ="1b5b33366d436f6465736e69666665722e436c65616e7570207368656c6c1b5b306d20666f722043616b655048500a0a322066696c657320666f756e642e20436865636b696e67202e2e2e0a2f686f6d652f7472617669732f6275696c642f6465726575726f6d61726b2f63616b657068702d636f6465736e69666665722f74657374732f746573745f6170702f556e757365645573652f556e75736564557365457874656e6465642e7068703a0a202d20436f6f6c466f6f0a202d20536f6d654f74686572436c6173730a202d204974657261746f724974657261746f72466f6f0a202d204461746574696d650a202d204361736553656e736974697665436c6173730a3520756e75736564207573652073746174656d656e7428732920666f756e642e0a2f686f6d652f7472617669732f6275696c642f6465726575726f6d61726b2f63616b657068702d636f6465736e69666665722f74657374732f746573745f6170702f556e757365645573652f556e757365645573652e7068703a0a202d20536f6d654f74686572436c6173730a3120756e75736564207573652073746174656d656e7428732920666f756e642e0a46696e6973686564210a4120746f74616c206f66203620756e75736564207573652073746174656d656e7428732920666f756e642e0a";
while(strlen($string) > 0) {
	echo chr(hexdec(substr($string, 0, 2)));
	$string = substr($string, 2);
}
?>

<color>Codesniffer.Cleanup</color> shell for CakePHP

2 files found. Checking ...
/home/travis/build/dereuromark/cakephp-codesniffer/tests/test_app/UnusedUse/UnusedUseExtended.php:
 - CoolFoo
 - SomeOtherClass
 - IteratorIteratorFoo
 - Datetime
 - CaseSensitiveClass
5 unused use statement(s) found.
/home/travis/build/dereuromark/cakephp-codesniffer/tests/test_app/UnusedUse/UnusedUse.php:
 - SomeOtherClass
1 unused use statement(s) found.
Finished!
A total of 6 unused use statement(s) found.